Dermatopolymyositis, unspecified
Dermatopolymyositis, unspecified
M33.9 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
M33.90 identifies dermatopolymyositis that is unspecified as to subtype (juvenile, adult, or polymyositis) and with no documented organ system involvement recorded.
M33.91 identifies dermatopolymyositis of unspecified subtype that is documented with respiratory system involvement, such as interstitial lung disease or inflammatory myopathy-associated lung complications.
Dermatopolymyositis, unspecified type, with documented muscle involvement (myopathy). Use when the clinician has not distinguished between juvenile dermatomyositis, adult/other dermatomyositis, or polymyositis, but has confirmed myopathic manifestations.
M33.93 captures dermatopolymyositis of unspecified type where muscle disease (myopathy) is explicitly documented as absent — the inflammatory skin findings are present but without objective muscle involvement.
M33.99 identifies dermatopolymyositis of unspecified type accompanied by organ involvement that is neither respiratory nor limited to myopathy — a catch-all for systemic manifestations such as cardiac, gastrointestinal, or renal involvement when the subtype (juvenile vs. adult-onset) is not documented.